桩网复合地基桩身受力特性模型试验

Mechanical Characteristics Model Test for Geogrid-reinforced and Pile-supported Composite Foundation

以某沿海铁路软土地基处理工程为依托,对桩网复合地基桩身受力特性进行了室内模型试验,得出了桩身轴力随着路堤填土荷载的增加而增大,随着桩间距的加大,桩身中性点下移;桩土应力比随着路堤填土荷载的增加而增大,随着桩间距加大明显增大等结论,为工程设计提供了理论参考依据。

In this paper, based on a coastal railway soft soil treatment project, indoors model test for mechanical characteristics of geogrid-reinforced and pile-supported embankment has been studied. The following conclusions have been drawn ： axial force rises following increase of embankment load, neutral point of piles drops as pile spacing increasing, pile-soil stress ratio rises as increase of embankment load and increases obviously as pile spacing increasing etc. , which could provide theoretical references for engineering design.